Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b49fce707c3928…

MALICIOUS

PDF

78.8 KB Created: 2021-01-06 15:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a643ec5f6610dfe204c70396f3da4bf6 SHA-1: 86f5ad31a2b37484b07cb9dc4decb0e1343d2712 SHA-256: d0b49fce707c39285083c4c93562c6016ad39698f72db0bbf8a76e4b6f20155b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded document body text, though corrupted, indicates a lure related to a "Ddp yoga diet guide", which is likely a pretext to drive traffic to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/aws?utm_term=ddp+yoga+diet+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490516/normal_5fe18a2e50cbc.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/Vhjggjg/acrylic_nails_designs_black_and_gold.pdfIn PDF document text
    • https://juludonidodag.weebly.com/uploads/1/3/4/7/134706402/babazelinoz.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/jenedut.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/6273486.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/vijusibiva.pdfIn PDF document text
    • https://jubibololir.weebly.com/uploads/1/3/2/8/132814038/6774338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wilugugo/kigesopepadisotan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3678de0a-7513-4daa-ae88-91f6e2c64cce/dryer_manual_kenmore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fbc6d9-ae6c-4406-9acc-e856b7ebbc71/archaeologies_of_the_future.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99cf4bd-4c91-4ff2-8832-4685b68aa9a4/perinowuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3368e1a7-c00e-4574-a8f4-46b6b8ee77ad/wetapudosomivage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0a8945-e575-4511-b12f-7ff709f654e2/rovupovegemenow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e56c51a-9dde-4feb-b4bf-59d5bb5735a5/54518917976.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 4920 bytes
SHA-256: 5a08badbe8f1cda3d2c1f7adef9c9a248d91ce4b8680d396a4b7a53e4a1098ee
font_01_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 11824 bytes
SHA-256: 447bd0c6af43578831c045c04c31bab64f0144f01724dc46a7004554adc8cf21
font_02_sfnt_off0001198a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198A 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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